States of Matter
Conservation of Matter
Atoms
Fair Test
Chemical Reaction?
100
What are the three states of matter?
Solid, Liquid, and Gas
100
If I mix together 20 grams of oats with 30 grams of water, how much should my oatmeal weigh?
20+30=50 grams
100
What part of an atom has a postive charge?
Proton
100
When testing for acids, James mixed 1 scoop of vinegar with 1 scoop of baking soda. Marcie mixed 1 scoop of vinegar with 2 scoops of baking soda. Is this a fair test?
No
100
You pour together pretzels, raisins, nuts, and chocolate chips into a bowl and stir them up. Is this a chemical reaction?
No - you can see all the original ingredients with their original properties.
200
Which state of matter has neither a definite shape, nor a definite volume?
Gas
200
10 grams of sugar is used to make 100 grams of lemonade. How much water do I need?
90 grams because 10+90=100
200
What is the nucleus of an atom made of?
Protons and neutrons
200
What is the term for the thing that I am changing in an experiment.
Variable
200
A shiny nail sits outside in the rain for two weeks. When you find it, it's covered in a reddish-orange coating. Is this a chemical reaction?
Yes - the appearance of a new solid of a different color means a new substance has formed.
300
Which state of matter has a definite volume, but does not have a definite shape?
Liquid
300
I measure out 40 grams of chocolate discs when making candy. After melting the chocolate down, what will happen to the mass of the chocolate?
It will stay the same!
300
What does the atomic number of an element tell you?
The number of protons and the number of electrons
300
Helen's class creates an experiment. She gets the same results as all her classmates. Did they create a fair test?
Yes, a fair test should give the same results when completed multiple times
300
You crack raw eggs into a pan. They start as a yellow, runny liquid. After heating, they become firm, yellow, and solid. Is this a chemical reaction?
Yes, the changing of the state and texture, as well as the odor, means this is a chemical reaction.
400
How do the particles of a solid behave?
They don't move much and are tightly packed together.
400
If I take a 200 gram bag of M&Ms and split it into 4 groups, the law of conservation of mass tells me that the mass of the 4 groups will...
Add up to the total mass of 200 grams.
400
When looking at the periodic table, how do you know how many neutrons an element's atom has?
You take the atomic weight/mass and subtract the atomic number.
400
Paul's experiment measures plant grown. He puts one plant in a large pot with sandy soil and another planet. in a small pot with dark, fertilized soil. How many variables are changed in this experiment? Is it a fair test?
2 variables - pot size and soil type
It is not a fair test.
400
You squeeze 5 drops of blue food coloring into a glass of water. The whole glass turns blue. Is this a chemical reaction?
No - the blue dye molecules spread out amongs the water molecules, simply changing the color of the molecules.
500
How do the particles of a gas behave?
They move quickly and spread out to fill the container they are in.
500
I mix together 50 grams of vinegar with 50 grams of baking soda. After mixing, I weigh the mixture to find that the mass is only 90 grams. How is this possible?
A new substance, carbon dioxide, was created and some of the mass is in the form of a gas, which escaped into the atmosphere.
500
Draw a model for an atom of fluorine.
500
When testing forces and motion, one team pushes a toy car hard from the top of a ramp, while the other team gently drops a toy truck from the middle of the ramp. Why is this NOT a fair test?
Too many things are being changed (type of car, starting location, force used)
500
A glass of milk sits on the counter for two days. It now smells terrible and has chunky lumps in it. Is this a chemical reaction?
Yes - the solids forming in the liquid, as well as the odor change shows a chemical reaction.